Peters



(No Model.) 2 Sheets-Sheet 1.

D. L. HARBACH.

SAW MILL SET WORKS.

N0. 330,020. Patented NOV. 10, 1885.v

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N.- PErERs, Phaxo-Lilhugnpher, wamingtnn. D. C.

(No Model) 2 sneetsheet 2.

D. L. HARBAGH.

SAW MILL SET WORKS. No. 330,020. Patented Nov. 10,1885.

Srarns Bernini DANIEL L. IIABBACI-I, OF SAN FRANCISCO, CALIFORNIA,ASSIGNOB TO TATUM d5 BOX/VEN, OF SAME PLACE.

estenuanti.l sern/oaks.

Application filed July 27, 1885.

To @ZZ 2071.071?. it may concern:

Beit known that l, DANIEL L. HARBAei-r, of the city and county of SanFrancisco, State of California, have invented an Improvement inLog-Setters for Saw-Mills; and I hereby declare the following to be afull, clear, and eX- act description of the same.

My invention relates to the class of sawmills and to new and usefulimprovements in setting the log on the head-block, and my inventionconsists in the power devices by which the ordinary or main knees ofthehead-block are adjusted, in peculiar opposing knees by which the log isstopped, and the mechanism for operating said knees, all of which Ishall hereinafter fully describe by reference to the accompanyingdrawings, in which- Figure l is a side'elevation, showing the mechanismfor adjusting the main knees. Fig. 2 is a plan of the same. Fig. 3 is aperspective view showing the opposing stop-knees and the mechanism foroperating them.

The object of my invention is to provide a simple and effectivemechanism for operating the various setting-knees.

A is the frame of the mill, and B is the reciprocating wheeled carriagetraveling on said frame. On the carriage are the head-blocks C, in whichare mounted and adapted to slide the main knees D, which are operated bythe screws E, as customary. On the ends of the screws are mounted thechain-pulleys F, over which passes an endless chain, G. Under the mainframe of the mill is a shaft, H, which is j ournaled in a box, 7i,adapted to be vertically adjusted in the guides h" by means of anysuitable lever-such, for example, as the elbowlever I. On theverticallyadjustable shaft H is a ohaiirpulley, J, which, when thrownup, is adapted to engage with and operate the endless chain G.

K is a sliding plate having standards k, in the tops of which aremounted shafts 7c. On one of these shafts is the driving-pulley L, towhich power is to be applied.

M are pulleys on the shafts 7J, and m is a crossed belt between saidpulleys. N are friction-pulleys on shafts it on either side of afriction-pulley, O, on the shaft II. p

P iu Fig. l is a lever by which thesliding plate K may be moved, wherebythe friction 1 T'C fermi-ng part of Letters Patent No. 330,020, datedNovember l0, 1385.

Serial No, 172,806. (No model.)

.the shafts 7s are driven in opposite directions.

By means of the lever I either of the frictionpulleys N, according tothe direction of the revolution desired, is brought into iinpingementwith the friction-pulley O, whereby the shaft II is rotated. By means ofthe lever I the shaft H is elevated to throw the chainpulley .I intoengagement with the endless chain G, and according to the direction ofits rotation the chain-pulleys F are rotated in one direction or theother, and the screws E set up or withdraw the knees D.

Q are skids belonging to the main frame of the mill. Journalcd insuitable bearings on the sides of these skids are screws q, on which arethreaded the stop-knees It. These are set up by the following mechanism:

S is a shaft having bevel-gears s, which mesh with bevel-gears q on thescrews q. Near the end of the shaft S is a bevel-gear, s', which mesheswith a bevel-gear, t, on a shaft, T, to which suitable power may beapplied.

A graduated disk, t', is supported upon a suitable frame, t2, and thetop of the shaft T passes loosely through this disk, and is providedwith a lever-handle, t3, which, moving over the graduated disk,indicates the amount of adjustment given to the knees B. In order tothrow the knees It back out of the way of the log when it is beingrolled upon the skids to reach the head-blocks and to throw them upagain, whereby they may be adjusted against the log to hold it, I havethe rod U, which connects the two knees through theirdownwardly-extending arms r. The end of the rod U is connected with thelower end of a lever, V, pivoted, as shown in Fig. 3. By moving thislever the knees B may be thrown back or up again. It will be observedthat by reason of the longitudinal movement of the knees R it isnecessary, in order to prevent the cramping of the connecting-rod U andlever V, that said rod and lever should move with the knees, and thatthis movement must be a positive one. Accordingly I pivot the lever V ona shaft, o, in such a manner that it IOO e 330,02c l may slide thereon.On the end of the shaft S, by which power is transmitted to the screwsto adj ust the knees, there is a pulley, WV, from which a belt or chain,w, extends to a pulley,

w. The connecting-rod U passes through an elongated slot in one of theskids.

The operation of adjusting the knees is as vfollows When the log isbeing rolled along the skids Q to its position against the main knees D,the stop-knees R are thrown back, so as not to be in the way. When thelog has reached its position against the knees D, the lever V isoperated to throw the knees R to a vertical position. The handle t isthen moved, whereby power is transmitted, through the shaft S and theintermediate bevel-gears, to the screws q, whereby the knees R are setup against the log. At the same time, through the pulley Vv* and chainw, the lever V is carried over with the knees, so that theconnectingvrod U will not cramp.

Having thus described my invention7 what I claim as new, and desire tosecure by Letters Patent, is-

1. In a log-setter for saw-mills, the combination, with the main kneesD, of a mechanism by which they are adj usted, consisting of the screwsE, the chain-pulleys F on the ends of the screws, the endless chain Gover said pulleys, and a vertically-adjustable chain-pul- A ley adaptedto be thrown into or out of engagement with the endless chain,substantially` as herein described.

2. In a log-setter for saw-mills, the main knees D, and the screws E, bywhich they are operated, in combination with the chain-pulleys F on the.ends of the screws, the endless chain G on said pulleys, thevertically-adj ust-l able chain-pulley J, engaging the chain G, andsuitable driving and adjustable friction gears or pulleys by which therotation of the chainpulley J is effected in either direction,substantially as herein described.

3. In a log-setter for saw-mills, the main knees D, having adjListing-screws E, the chainpulleys F on the screws, and the endlesschain G over said pulleys, in combination with the vertically-adjustableshaft H, the chain-pulley J and the friction-pulley O on said shaft, thehorizontally-sliding shafts c, the pulleys M on said shafts, and crossedbelt m, the frictionpulleys N on the shafts k', adapted to impingevalternately on the friction-pulley O, and the driving-pulley L on one ofsaid shafts, all arranged and adapted to operate substantially as hereindescribed.

4.. In a log-setter for saw-mills, the combination of the main knees onone side ofthe log, the vertically-swinging stop-knees on the oppositeside, and the screws upon which the stop-knees are mounted, said screwshaving bearings in the mainframe and operated by suitable gearing,substantially as herein described.

5. In a log-setter for saw-mills, they combination of the main knees andmechanism for operating the same with the pivoted and adjustablestop-knees R, provided with arms r, a lever, V, fulcrumed upon a shaft,fu, and a rod, U, connecting the lower end of the lever with the shortarms of the stop-knees, whereby the latter may be thrown back to allowthe log to pass, and be thrown up again, substantially as hereindescribed.

6. Ina log-setter for saw-mills, the stopkneesR and screws q, on whichthey are mounted and pivoted, `in combination with the mechanism bylwhich the screws are op eratedto adjust the knees, consisting of theshafts S and T, and suitable bevel-gears by which power is transmittedfrom the shaft T, through the shaft S, to the screws, andthe mechanismby which thevknees are thrown back and up again, consisting cf theconnecting-rod U between the two knees and the pivoted lever V,substantially as herein described;

7. In a log-setter for saw-mills, the pivoted knees R and screws q, incombination with the adjustingmechanism, consisting of the shafts S andT and suitable intervening power-transmitting gears, the mechanism forthrowing back and upagain the knees, consisting of the connecting-rod U,and the lever V, pivoted and adapted to slide on a shaft or rod, o, and

`the means by which the rod U and lever V lare -inade to accompany theknees,.consisting of the lpulley W on the shaft Sthe pulley to', and theendless belt or chain w, passing over said p'ulleys'and connected withthe lever, substantially as herein described.

In witness whereof I have hereunto setA my hand.

DANIEL L. HARBAGH. Witnesses:

S. H. NoURsE, IIC. LEE.

IOO

